API 导出 pdf 文件报错(linux 服务器)

 

ExceptionConverter: com.lowagie2.text.DocumentException: /usr/share/fonts/cantarell/Cantarell-VF.otf is not a true type file.
at com.lowagie2.text.pdf.TrueTypeFontSubSet.createTableDirectory(TrueTypeFontSubSet.java:241)
at com.lowagie2.text.pdf.TrueTypeFontSubSet.process(TrueTypeFontSubSet.java:137)
at com.lowagie2.text.pdf.TrueTypeFontUnicode.writeFont(TrueTypeFontUnicode.java:336)
at com.lowagie2.text.pdf.FontDetails.writeFont(FontDetails.java:250)
at com.lowagie2.text.pdf.PdfWriter.addSharedObjectsToBody(PdfWriter.java:1212)
at com.lowagie2.text.pdf.PdfWriter.close(PdfWriter.java:1291)
at com.lowagie2.text.pdf.PdfDocument.close(PdfDocument.java:964)
at com.lowagie2.text.Document.close(Document.java:584)
at com.view.pdf.PdfReport.save(PdfReport.java:349)
at com.raqsoft.report.util.ReportUtils.exportToPDF(ReportUtils.java:461)。
该怎么解决这个问题?